ISSN 2285-5750, ISSN CD-ROM 2285-5769, ISSN-L 2285-5750, ISSN Online: 2393 – 2260
 

Published in Scientific Papers. Series D. Animal Science, Vol. LXV, Issue 2
Written by Magdalena TENCIU, Elena SÎRBU, Victor CRISTEA, Neculai PATRICHE, Maricel Floricel DIMA, Veta NISTOR, Mirela CREȚU

This study aimed to evaluate the effect of additives used in tilapia feed and represented by TechnoMos® prebiotic (Saccharomyces cerevisiae) and BetaPlus® probiotic (Bacillus subtilis and Bacillus licheniformis) on the growth and biochemical composition of biological material. The analysis of the results obtained on the principal growth indicators shows a positive correlation between the applied feeding regime and the biomass gain. In the first experimental stage, there was an upward trend of biomass gain depending on the feeding regime applied, obtaining values between 1439 ± 18.29 g in the control variant (V0) and 1774.61 ± 47.65 g in the experimental variant with synbiotic (V3). In the second experimental stage, the biomass gain obtained varied from 3286 ± 15.05 g in the control variant to 4078.52 ± 69.84 g in the synbiotic variant. Biochemical analysis of tilapia muscle tissue showed an increase in the content of proteins, lipids in biomass of the samples fed with the probiotic Betaplus® correlated with the increase in biomass weight, compared to the control variant. In conclusion, the analysis of growth indicators shows the beneficial effect of symbiotic variant through their synergistic action and the influence of probiotic applied on improving biomass gain and biochemical composition.

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Published in Scientific Papers. Series D. Animal Science, Vol. LXV, Issue 2
Written by Anatolie DANILOV, Iov DONICA

The aim of the research was directed to: assess the nutritional potential and the impact on production indices, blood and economic, using in the food of the young pig breeding, the nut kernel cake in different proportions. The results of the analysis of the chemical composition showed that the nut kernel cake contains: 4.19% nitrogen, 26.2% crude protein, 9.34% crude cellulose, 13.6% fat, 12.69 Mj/kg metabolizable energy, 0.33% calcium and 0.44% phosphorus. The results of this study indicate that nut kernel cake represents a viable solution for the partial replacement of soybean meal in the food of the young pigs, because the use of the amount of 4%/t and 8%/t of compound fodder, reduces feed consumption by 3.8% and 5.2%, increases feed conversion rate by 5.3%-4.5%, the average daily increase in the experiment increases by 1.4%, does not negatively affect the state of health and blood indices reduces the cost price of 1kg of compound fodder on average by 1.3 and 2.2 cents.

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Published in Scientific Papers. Series D. Animal Science, Vol. LXV, Issue 2
Written by Rumyana IVANOVA, Hristo HRISTEV

We studied the influence of environmental factors on the prevalence and clinical manifestations of pasteurellosis in rabbits of the California and New Zealand breeds over a period of one year. It was found that the minimum temperatures in winter and the maximum in summer were out of the optimal values: 4-7 and 16-18ᴼС, respectively. The relative humidity during most of the year was out of the recommended levels / 60-70% /, both at the average and at the maximum measured values. The concentration of ammonia exceeded the average values by about 16 mg / m3, and the maximum values by about 30 mg / m3. The dust content varied from 0.9 to 6 mg / m3 with average values of 3.6 mg / m3. The total number of isolated microflora in m³ air was 6.83 x 103 (6.5-7.3 x 10³).Dominant in the biological material and washes / from cages, walls and inventory / were the representatives of Salmonella, Staphylococcus, Streptococcus, Pasteurella and Colibacteria; and from the molds Aspergillus flavus, A. fumigatus, Penicillium, Alternaria and Mucor. Antibodies against Pasteurella multocida were found in 60% of the population. Exacerbation of the disease and higher mortality was observed during pregnancy and during the suckling period. The main complications were - respiratory disorders (51%) followed by inflammation of the conjunctiva. About a quarter of the affected animals (26.4%) suffered from the mixed form of the disease. We found that Inflammation of the ears was extremely rare (0.2%). A relationship has been established between the number of environmental factors and the incidence of respiratory diseases. We can conclude that environmental factors are actively involved in the development, form and severity of pasteurellosis in rabbits.

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© 2019 SCIENTIFIC PAPERS. SERIES D. ANIMAL SCIENCE. To be cited: SCIENTIFIC PAPERS. SERIES D. ANIMAL SCIENCE.

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